Scrub brush



FIG. 1 is a left side of the present invention; and

FIG. 2 is a right side thereof; and

FIG. 3 is a bottom view thereof; and

FIG. 4 is a top view thereof; and

FIG. 5 is a perspective view thereof; and

FIG. 6 is a rear view thereof; and,

FIG. 7 is a front view thereof. 

CLAIM The ornamental design for the scrub brush, as shown and described. 